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प्रश्न
A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper. Identify B. Write the equation with copper.
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उत्तर
The dilute acid is nitric acid (HNO3).
Reaction:
\[\ce{\underset{Copper}{3Cu} + \underset{acid}{\underset{Dil. nitric}{8HNO3}} -> \underset{Copper nitrate}{3Cu(NO3)2} + \underset{monoxide}{\underset{Nitrogen}{2NO}} + 4H2O}\]
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संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of cold and dilute Nitric acid on Copper
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Name the products formed when carbon and conc. nitric acid is heated.
Name the oxide of nitrogen which turns brown on exposure to air. How is it prepared?
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
Give reason for the following:
Conc. Nitric acid renders iron passive.
How will you prepare Aqua regia from nitric acid?
During a thunderstorm, the rainwater contains nitric acid. The nitric acid is formed as a result of three chemical reactions. Describe or write balanced chemical equation for these three reactions.
Write the equation for the reaction of dilute nitric acid with copper.
X, Y and Z are three crystalline solids that are soluble in water and have a common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).
- A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
INFERENCE 1: The common anion is the ______ ion. - When X is heated, it melts and gives off only one gas which re-lights a glowing splint.
INFERENCE 2: The cation in X is either ______ or ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the ______ cation. - Write the equations for the following reactions:
- X and concentrated sulphuric acid (below 200°C). (One equation only for either of the cations given in INFERENCE 2)
- The action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
